From: Brian Hescock (bhescock@xxxxxxxxx)
Date: Mon Nov 26 2001 - 19:38:47 GMT-3
what about using frame-relay end-to-end keepalives? It would mark the physical
interface as down if the keepalives weren't received and then backup interface
would work.
B.
Jim Brown wrote:
> Couldn't the circuit die at one end of the PVC and all would appear normal
> to the other end. How would this bring up the backup connection?
>
> I might be wrong, I have been plenty of times in the past, but doesn't
> backup interface command only monitor connectivity between the interface and
> the switch. It does nothing to ensure end-to-end connectivity of the PVC.
>
> If I have the backup command on one end and the other end has a PVC failure
> between itself and the switch, the backup interface would never know the
> complete PVC was down and the ISDN backup would never kick in.
>
> The lab requirement is just probably another poorly worded statement in
> terms of the desired result.
>
> AFAIK, the backup command can only account for local failures without the
> resiliency of end-to-end monitoring.
>
> -----Original Message-----
> From: Harris, Joe F [mailto:Joe_Harris@AIMFUNDS.COM]
> Sent: Monday, November 26, 2001 3:17 PM
> To: Jim Brown
> Cc: ccielab@groupstudy.com
> Subject: RE: Boot Camp Lab 20
>
> Jim,
>
> He is correct about using a sub-interface to backup the DLCI. Here is a link
> to better get you acquainted with the feature. Hope this helps.
>
> http://www.cisco.com/warp/public/125/19.html
>
> -Joe Harris
> CCIE# 6200
>
> -----Original Message-----
> From: Jim Brown [mailto:Jim.Brown@CaseLogic.com]
> Sent: Monday, November 26, 2001 4:02 PM
> To: 'Ken Snyder'; 'ccielab@groupstudy.com'
> Subject: RE: Boot Camp Lab 20
>
> The backup interface command does not address the failure of a DLCI, it only
> address the failure of the interface. If the DLCI/PVC is broken, the link
> will never come active.
>
> If this were the real lab, you would lose points for the solution presented
> based on the requirements.
>
> -----Original Message-----
> From: Ken Snyder [mailto:phizzog@home.com]
> Sent: Monday, November 26, 2001 5:50 PM
> To: 'Jim Brown'; ccielab@groupstudy.com
> Subject: RE: Boot Camp Lab 20
>
> The backup command on a Sub interface is used to meet the DLCI requirement.
> I'm looking into that Authentication issue.
>
> Regards,
>
> -Ken
> -----Original Message-----
> From: Jim Brown [mailto:Jim.Brown@CaseLogic.com]
> Sent: Monday, November 26, 2001 1:33 PM
> To: 'Ken Snyder'; Jim Brown; ccielab@groupstudy.com
> Subject: RE: Boot Camp Lab 20
>
> How about all of the important parts of the ISDN section
>
> There are username and passwords on both ends and one of the requirements is
> authentication only one way and I see nothing in the solution configs to
> support this. PPP callin maybe?
>
> The requirement for the link to fire up if the DLCI fails? I see nothing to
> support this requirement? I would probably use FREEK?
>
> -----Original Message-----
> From: Ken Snyder [mailto:phizzog@home.com]
> Sent: Monday, November 26, 2001 5:25 PM
> To: 'Jim Brown'; ccielab@groupstudy.com
> Subject: RE: Boot Camp Lab 20
>
> Please provide more information regarding your issue with Lab 20's ISDN.
>
> Regards,
>
> -Ken
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Jim
> Brown
> Sent: Monday, November 26, 2001 1:08 PM
> To: ccielab@groupstudy.com
> Subject: Boot Camp Lab 20
>
> Has anyone looked at CCBootCamp Lab 20 solution? The ISDN requirements on
> the lab are not reflected in the solution configs as far as I can tell.
>
> I definitely don't see the one way authentication.
>
> I'm starting to work through some of these and the errors are driving me
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